Lab Report for Group I Cations

EXPERIMENT 9: GROUP II CATIONS PURPOSE numeral values are not the end all and be all of chemistry experiments. qualitative observations are equally classic as indicators of chemical form and the nature of the reactants participating in a chemical reaction. In this experiment, the focus was on qualitative analysis of the Group II cations, Cu2+, Bi3+, Pb2+, Sn4+ (DePaul University, 89). Through a exercise of rapidly spinning the solutions in a centrifuge, adding different acids to the solutions, and analyzing the reactions of the be liquids and precipitates, the qualitative data in this experiment determined the battlefront of copper, bismuth, lead, and tin in a known and unknown beat solution. PROCEDURE In the former weeks experiment, the proper molarities of the necessary acids were prepared. The molarities of these acids embroil: 6 M HCl, 6 M HNO3, 6 M NH4OH, and 6 M H2SO4. To make 30 mL of 6 M HCL, 14.8 mL of the acid was added to 15.2 mL of deionized water suppl y. To make 30 mL of 6 M HNO3, 11.4 mL of the acid was added to 18.6 mL of deionized water. To make 30 mL of 6 M NH4OH, 12.0 mL of the acid was added to 18.0 mL of deionized water. Finally, to make 30 mL of 6 M H2SO4, 9.93 mL of the acid was added to 20.07 mL of deionized water.

The remainders of these acidic solutions from the previous(prenominal) weeks experiments were stored in the laboratory cabinets and used in this weeks experimentations. Refer to determine 9.1 on Page 94 of the lab manual for the experimental office (DePaul University, 94). This flowchart was followed for the known sample. The flowchar t was then restate for the unknown sample. ! Instead of using NH3, NH4OH was used. Precisely fifteen drops of deionized water were... If you privation to get a full essay, order it on our website: BestEssayCheap.com

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